PDF malware analysis — malicious · f5215d00d165de93

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 23:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: c94fa72b09e54af54eaf1b84e7d6feb2 SHA-1: bc1f3547d8cb7783102cd796e03c2facf17659f5 SHA-256: f5215d00d165de937ec430ad4dd9ec61642186eb7cd7260531d831bb584f54a8

152 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, https://ttraff.com/wix?keyword=rikki+tikki+tavi+summary, is flagged as a known malicious redirector. While many other links point to benign content, the presence of the malicious redirector and the sheer volume of links suggest an attempt to manipulate search engine results or to lure users to malicious destinations. No scripts were extracted, and the document body is largely unreadable binary data.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.com/wix?keyword=rikki+tikki+tavi+summary
- https://static.usrfiles.com/ugd/2e4eb4_abb17c411d924be79f716bdd06bc7057.pdf
- https://static.usrfiles.com/ugd/b8c837_cec04c638e034c9bb057eca5ea089791.pdf
- https://static.usrfiles.com/ugd/b5aed9_2e17176fadc84172bf132bc5469dce2d.pdf
- https://static.usrfiles.com/ugd/b8c837_924976c92036418caa81c284af223ef3.pdf
- https://static.usrfiles.com/ugd/b4609a_6c485e3bd72241ad92395177f245eaa5.pdf
- https://static.usrfiles.com/ugd/09273f_87f7da200c2244b3a855164190ee49fc.pdf
- https://cdn.shopify.com/s/files/1/0429/5668/5468/files/letter_format_for_noc_driving_license.pdf
- https://cdn.shopify.com/s/files/1/0436/9596/4328/files/b_27_target.pdf
- https://cdn.shopify.com/s/files/1/0430/4191/5042/files/angina_de_pecho_complicaciones.pdf
- https://cdn.shopify.com/s/files/1/0433/2381/8139/files/kebumopilerozinis.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006211.bin` `c1eeb1b319a5175d872855271df64e0a63c7957991d7ddf44288f0462aeb311f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6211	5032 bytes
`font_01_sfnt_off00007324.bin` `62e77f14577abb6855198331ddfdbb3d0fa182174e4461e7a3593f821f804561`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7324	9808 bytes

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